LeetCode 0017 - Letter Combinations of a Phone Number

Parent index: LeetCode 500 Problem Index MOC

Problem Metadata

• LeetCode URL: https://leetcode.com/problems/letter-combinations-of-a-phone-number/
• Frontend ID: 17
• Difficulty: Medium
• Primary category: Backtracking
• Source lists: NeetCode Practice, NeetCode 150, NeetCode 250, LeetCode 75, Top Interview 150, Top 100 Liked, Grind 75, Sean Prashad LeetCode Patterns

Related Algorithms

• Backtracking
• Backtracking Framework
• Recursion vs Iteration
• Hash Table

Research Status

• Problem statement and constraints verified against the LeetCode page.
• Core algorithm explained in paper-style prose.
• Worked examples, edge cases, complexity proof, and pitfalls added.
• Solution variants linked back to the relevant algorithm notes.

See Also

• LeetCode 500 Problem Index MOC
• SWE Interview Preparation MOC